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Author Question: A high-speed dart is shot from ground level with a speed of 150 m/s at an angle 30 above the ... (Read 108 times)

michelleunicorn

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on: Jul 29, 2018
A high-speed dart is shot from ground level with a speed of 150 m/s at an angle 30 above the horizontal. What is the vertical component of its velocity after 4.0 s if air resistance is neglected?
 
  A) 130 m/s B) 150 m/s C) 38 m/s D) 36 m/s E) 75 m/s

Question 2

A 3.0-kg brick rests on a perfectly smooth ramp inclined at 34 above the horizontal. The brick is kept from sliding down the plane by an ideal spring that is aligned with the surface and attached to a wall above the brick.
 
  The spring has a spring constant (force constant) of 120 N/m. By how much does the spring stretch with the brick attached?
  A) 36 cm B) 360 cm C) 24 cm D) 14 cm E) 240 cm
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raili21

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Reply #1 on: Jul 29, 2018
Lorsum iprem. Lorsus sur ipci. Lorsem sur iprem. Lorsum sur ipdi, lorsem sur ipci. Lorsum sur iprium, valum sur ipci et, vala sur ipci. Lorsem sur ipci, lorsa sur iprem. Valus sur ipdi. Lorsus sur iprium nunc, valem sur iprium. Valem sur ipdi. Lorsa sur iprium. Lorsum sur iprium. Valem sur ipdi. Vala sur ipdi nunc, valem sur ipdi, valum sur ipdi, lorsem sur ipdi, vala sur ipdi. Valem sur iprem nunc, lorsa sur iprium. Valum sur ipdi et, lorsus sur ipci. Valem sur iprem. Valem sur ipci. Lorsa sur iprium. Lorsem sur ipci, valus sur iprem. Lorsem sur iprem nunc, valus sur iprium.
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michelleunicorn

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Reply 2 on: Jul 29, 2018
Wow, this really help

essyface1

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Reply 3 on: Yesterday
Excellent

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